FITT & WELL, Cardio - chapter 5 ("super simple intervals")

Use simple intervals to improve cardiovascular fitness! High Intensity Interval Training (HIIT) methods boost cardio and fat-burning potential! Watch this video for a quick explanation of how to add interval training to your cardio workouts whatever your fitness level.
More in the book "FITT & WELL" available for purchase at https://www.amazon.com/dp/B09ZQ1RC6G